Oh My God, I Turned into an Octopus

Reborn as a Fish, Evolved into a Dragon in the Deep Sea

The protagonist is awesome

The Protagonist Turns into an Animal and Evolves Along the Way.

Brothers, there is a shortage of books. Ask the protagonist to turn into an animal and evolve along the way.

The Protagonist Is an Animal, with Great Looks, and Just Enough Fighting Power to Keep Up.

Ah, the best, the best. Well, it's like a nine-tailed fox. Of course, when the protagonist should be ruthless, he still needs to be ruthless.

The Earth's Spiritual Energy Is Revived, Animals Devour and Evolve, Genes, the End

Completed, no stallion, no harem, three correct views

The Protagonist Is Reincarnated into a Strange Thing (Creature)

Reborn as an Animal or Something Else, a System

Like "Evolution from a Lake"

Is There Any Novel That Takes the Ocean as Its Main Theme, Preferably the Seabed.

The more the merrier